See more: Crankshaft Parts
For Big Twin Models, Crank pin with special 180 degree oiling system for more complete lubrication on bearing diameter, fits 1941 thru early 1981 Big Twin models (OEM 23961-41)
The crank pin is the heart of your engine. Why take a chance, everything revolves around this component! For that reason Jim's Machining in the USA has spent three years developing the ultimate crank pins available. Made from aerospace quality alloy bar steel, made to perfection by Jim's. The pins offer excellent strength and toughness. They are ground to a 16 micron finish with a diamond grinding wheel then polished to a 6 micron finish. Available for Sportster and Big Twin models.
Note: Late 1981 thru early 1983 models require 1"-20 TPI nuts (ZPN235827)